This Interactive Ashtray Rewards Smokers For Throwing Away Their Butts

Cigarette butts are the bane of a city's existence: you can find them almost everywhere, smashed flat on the sidewalks, stubbed into planter boxes, drifting into the gutters like tube-shaped snow. While some public spaces offer ways to dispose of those lipstick-rimmed filters, most smokers simply use the street as an open ashtray.